Lock-nut.



Wl F.' CONROY.

LOCK NUT. APPLICATION FILED AUG5| 1913.l

Patented June 15, 1915.

l ,ID DtF www C W/TNESSES I THE MORRIS FET CO.. FHOTD LITHO WASHINGTON,D C,

WILLIAM FREDERICK CONROY, OF NANUET, NEW YORK.

LOCK-Nom.

Specification of Letters Patent.

Patented June 15, 1915v Application led August 5, 1913. Serial No.783,045.

To all w/Lom it may concern Be it known that I, WTILLIAM FREDERICKConnor, a citizen of the United States, and a resident of N anuet, inthe county of Rockland and State of New York, have invented new andImproved Lock-Nut, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved lock nutarranged to permit of screwing up a nut on a bolt to the desiredposition, to securely lock the nut against accidental unscrewing and toallow an operator to unscrew the nut whenever it is desired to do so.

ln order to accomplish the desired result use is made of a nut providedon the under side with a recess in which is arranged a fiat springsecured to the nut at one end and provided at its free end with a toothengaging ratchet teeth on a retaining member held` against turning. Useis also made of Va screw fastening the spring in place in the nut andextending lengthwise in the nut to be accessible from the outer face ofthe nut to allow of unfastening the spring whenever it is desired toremove the nut.

A practical embodiment of the invention is represented in theaccompanying drawings forming a part o` this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews.

Figure 1 is a sectional side elevation of nut provided with theimprovement and shown in position for fastening two parts together; Fig.2 is a face view of e retaining member Yprovided with the ratchet teeth;Fig. 3 is a rear face view of the nut; and Fig. 4L is a cross sectionofthe same on the line 4 4 of Fig. 1.V

As shown in Fig. l the parts A and B are fastened together by a bolt Cand a nut D screwing on the said bolt C. The nut D is provided in itsunder side or base with a recess D in which is arranged a fiat helicalspring E fastened to the bottom lof the recess D by the use of a screw Fextending lengthwise in the nut D and screwing into the spring E, asplainly indicated in Fig. 4. The head F of the screw F is countersunk inthe outer face of the nut D so as to form no undesirable projection onthe said nut. The free end of the spring E is provided with one or moreteeth VE engaging ratchet teeth G arranged in a circle on a retainingmember G', preferably in the form of a washer, loosely engaging the boltC and having` a key G2 fitting into a key-way or groove C extendinglengthwise on the bolt C. By the arrangement described t-he retainingmember G is held against turning on the bolt C.

ln fastening the parts A and together the bolt C is engaged with theparts and then the retaining member G is slipped over the free end ofthe bolt to rest against the outer face of the part B with the ratchetteeth G extending forwardly. rThe nut D is now screwed onto the outerend of the bolt C and when the nut D nears innermost position its toothor teeth E engage the ratchet teeth G and glide over the same onscrewing' up the nut D to final position, that is, until the parts A andB are securely fastened together. .t will be noticed that the spring Eand its tooth or teeth E now act as a dog of the noticed by the nut D isratchet teeth of the nut D also be reference to Fig. l that when screwedup to final position the G extend within the recess D so th is screwedup the open end of the recess D is completely closed and consequently noextraneous matter can lodge within the recess.

When it is desired to unscrew the nut DI the operator unscrews the screwF so as to unfasten the spring E from the nut D to allow of unscrewingthe latterY on the bolt C. After the nut D has been unscrewed the springE is again fastened in place in the nut D by replacing the screw F sothat the nut is again in condition for use on a bolt.

rlhe lock nur shown and described is very simple in construction and canbe cheapl. manuiactured and readily7 applied to bolts non7 generallyconstructed, it being understood that it is not absolutely necessary toprovide the bolt C with the groove C as the retaining member G may befastened in place on the part B to member against turning.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

l. A lock nut, comprising a retaining member held against turning andprovided with ratchet teeth arranged in a circle, a nut hold theretaining provided at its under side with a recess, a spring arranged inthe said recess and provided with a tooth engaging the ratchet teeth ofthe retaining member, and means for detachably securing the spring tothe nut, said means being operable from the outer face ot' the nut.

2. A lock nut, comprising a retaining member held against turning andprovided with ratchet teeth arranged in a circle, a nut provided at itsunder side with arecess, a spring arranged in the said recess an securedat one end to the nut, the free end of the said spring being providedwith a tooth engaging the ratchet teeth of the retaining member, and ascrew extending through the nut to the outer face thereof and screwingin the said spring to detachably fasten the latter in position in therecess oi' the nut.

3. ln combination with a bolt, having a lengthwise extending groove, aretaining member slidable on the said bolt and pro- Copes of this patentmay be obtained for five cents each, by addressing the vided with a keyiitting into the said groove to hold the said retaining member againstturning on the bolt, the said retaining member being provided withratchet teeth an ranged in a circle, a nut screwing on the said bolt andhaving its under side provided with a recess, a iiat segmental springarranged within the said recess and provided at its free end with atooth in engagement with the said ratchet teeth, and a screw eX- tendingthrough the nut to the outer face thereof and screwing into the otherend of the said spring to removably fasten the latter to the nut, thehead oi' the screw being countersunl; in the outer face of the nut.

ln testimony-whereof lhave signed my name to this specification in thepresence'of two subscribing witnesses.

WILLlAllI FREDERICK ONROY. Witnesses:

Y C. E. HoLsKn,

PHiLir D. ROLLHAUS.

Commissioner of Patents,

Washington, D. C.

